Log-turner.



Patented Jan; 2|, I902. T. s.- WILKIN.

L0 G T U R N E R.

I (Application filed May 275, 1901.)

, (No Model.)

UNITED STATES PATENT O F CE.

THEODORE S. lVILKIN, OF MILl/VAUKEE, WISCONSI N.

LOG-TURNER.

SPECIFICATION formingpart of Letters Patent No. 691,517, dated January 21, 1902.

Application filed May 25, 1901. Serial No. 61.853. No model.)

To all whom it may concern:

Be it known that I, THEODORE S. WILKIN, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have in vented a new and useful Improvement in Log- Turners, of which the following is a description, reference being had to the acccompanying drawings, which are a part of this specification.

My invention relates to improvements in log-turners or niggers, such as are employed in sawmills for turning or rolling over logs on the carriage or adjacent thereto.

The object of my improvements is to provide mechanism having a maximum of [iexibility in connection with required strength especially at localities in the apparatus where strength of the parts is especially required, the apparatus being so constructed and arranged as to have the greatest possible facility of movement and adaptation for the work .it is to do.

The invention consists of the mechanism, its parts and combinations of parts, as herein described and claimed, or the equivalents thereof.

In the drawings, Figure 1 is an elevation of my improved mechanism in connection with a fragment of a sawmill-carriage and related parts so disposed as toshow the relation of the log-turner to the carriage and to a log lying on the carriage. Fig. 2 is a detail, mostly in section, of a valve used in connection with the compression-cylinders employed for operating my improved turner. Fig. 3 is an elevation of a modified form of a log-turner.

This log-turner may be actuated by steam, compressed air, or other fluid medium; but as steam is more generally used as the motive power in sawmills at the present day I have shown my improved log-turner in connection with two steam-cylinders therewith adapted for operating the log-turner.

In the drawings, A represents a sill in a sawmill, having a track thereon on which the mill-carriage B travels, the carriage being provided with a head-block C, on which the log rests during the time of its being cut up and withrelation to the turning of which log or the moving it onto the carriage my improved nigger is used.

ger is provided at oneside and near its upper end with a series of teeth 6 and at its lower extremity is turned laterally and hinged to the upper end of a piston-stem 7, which stem is provided with a piston reciprocable in the cylinder 8, the cylinder being mounted at its lower end pivotally on a block 9, resting on the floor D. A link-bar 10-is pivoted at one end to the bar 5 at its articulation with the stem 7, and at its other extremity the bar 10 is pivoted to a block 1l,'fixed on the post E. The blockll is provided with a series of holes arranged in vertical plane,

and the bar 10 is adapted to be pivoted to the block 11 by a pin 12, inserted in any one of the holes, thereby making the link-bar ad-' justable vertically at this extremity.

An auxiliary nigger-bar 13 is pivoted at its upper end to the toothed bar 5 at its rear edge opposite the teeth 6 and at or near its upper extremity, and the bar 13 at its other end is. connected to a piston-stem 14, which is provided with a piston reciprocable in the cylinder. 15, which cylinder is mounted pivotally on a block 16, resting on the floor D. A link-bar 17 is connected at one end to the auxiliary bar 13 at its articulation with the piston-stem 14 and at its other extremity is pivoted in 'a block 18, which block is secured to a post E. The bar 17 is pivoted to the block 18 adjustably vertically by means of a pin 19, adapted to be inserted in any one of a series of vertically-disposed holes therefor in the block 18. The cylinders 8 and 15 are located at a distance from each other and so pivoted and disposed as to be adapted to swing in the same vertical plane toward and from each other or parallel with each other, and the link-bars 10 and 17 extend from the bars 5 and 13, respectively, laterally in substantially the same vertical plane in which the bars 5 and 13 are located.

A pipe 20 for steam or other actuating medium leads through valves 21 21 into the cylinders 8 and 15, respectively, to supply the necessary steam or actuating medium for moving the pistons of the stems 7 and 14.

are substantially in an upright position and ICO The valves 21 consist severally of a revoluble truncated-cone hollow valve provided with ducts 22 23, the valves in each cylinder being provided with radial arms connected together by a rod 24, whereby they are capable of being rotated in the valve-chamber, so as to bring the ducts into registration with corresponding duets 22 23', leading from the central chamber of the valve to the cylinderchamber, and to be rotated so as to cut oft these ducts when desired. The valve is also provided with an exhaust-duct 25 sodisposed in the valve as to be capable of being rotated to the duct 22' and then connecting that duct to the exhaust-port 26. Itwill be understood that these valves, in connection with these cylinders 8 and 15, can be so operated as to actuate the pistons in the cylinder severally or concurrently, as desired.

In the modified form of construction shown in Fig. 3 the auxiliary link-bar 17 is omitted and a connecting-link 27 is employed, which link at its respective ends is connected to the bar 5 and the bar 13 at their articulations with the piston-stems 7 and 14, respectively.

\Vhat I claim as my invention is- 1. A logturner, comprising an upright toothed bar extending laterally'at its lower end, an oscillating cylinder provided with a reciprocable piston to which the toothed bar is connected at one side of its upright extenity connected to a piston-stem, a laterallyextending link connected to the toothed bar and to a fixed support, an auxiliary bar connected to the toothed barand to a pistonstem, oscillating cylinders in which said piston-stems and their pistons oscillate, and

means connected to the auxiliary bar at its articulation with the piston-stem supporting it laterally.

3. In a log-turner, an upright toothed bar extending laterally at its lower end, an auxiliary bar pivoted to the toothed bar at or near its upper end, oscillating cylinders having pistons with stems to which said bars are respectively pivoted, laterally-extending links pivoted respectively to the lower extremities of said bars and controlling their movements laterally, and means forintrodncing an actuating medium into and exhausting'it from the cylinders.

4. A log turner, comprising an upright toothed bar extending laterally at its lower end, an oscillating cylinder provided with a reciprocable piston to which the toothed bar is attached at one side of its upright extension, a-link pivoted to the toothed bar at its articulation with the piston-stem and extendin g laterally therefrom and pivoted to a fixed support, an auxiliary bar pivoted to the toothed bar near its upper end and opposite the teeth thereon and to the stem of a piston, another oscillating cylinder in which said lastmentioned piston and stem are reciprocable, another link pivoted to said auxiliary bar at its articulation with the piston-stem and extending laterally therefrom and pivoted to a fixed support, and means for adjusting said laterally-extending links vertically.

.-In testimony whereof I affix my signature in presence of two witnesses.

THEODORE S. VVILKIN.

\Vitnesses:

A. L. MORSELL, O. T. BENEDICT. 

